Network Programming (BIT401CO)

Client-server socket programming — TCP/UDP sockets, I/O multiplexing, broadcast/multicast, and raw sockets in C/Unix.

1. Unit 1: Introduction to Network Programming5 hrs

   • Introduction to computer network: client/server model
   • Protocol Suite (ISO/OSI, TCP/IP)
   • Unix Standards (POSIX, OpenGroup, IETF)
   • Network Utilities (telnet, route, ipconfig, ifconfig, ping, netstat, and ftp)
   • Introduction to programming: wrapper functions, header files, libraries and ports numbers, IP address
   • Iterative server, concurrent server, networked servers

2. Unit 2: Elementary Operating System Calls6 hrs

   • System call, program, thread, process, Kernel
   • fork(), exec() and its family, waitpid(), wait()
   • pipe(), Fifo(), signals (SIGCHLD, SIGINT, SIGIO)
   • IPC Names, creating and opening IPC channels, IPC permissions

3. Unit 3: TCP/UDP Transport Layer Protocols4 hrs

   • TCP (Transmission Control Protocol): features, connection establishment and termination, states in communication (LISTEN, TIME_WAIT, ESTABLISHED, BLOCKED)
   • UDP (User Datagram Protocol): features, uses, comparison with TCP
   • TCP and UDP buffer sizes and limitations
   • SCTP overview

4. Unit 4: Elementary Socket Calls5 hrs

   • Socket address structure: for IPV4, IPV6, UNIX domain socket and generic socket address structure, value-result argument
   • Byte ordering and manipulating function: htonl(), htons(), ntohl(), ntohs(), inet_addr(), inet_aton(), inet_ntoa(), inet_pton()

5. Unit 5: Elementary TCP-UDP Socket6 hrs

   • Socket(), connect(), bind(), listen(), accept(), read(), write(), close()
   • sendto(), recvfrom()

6. Unit 6: I/O Multiplexing4 hrs

   • Introduction, I/O models: blocking I/O, non-blocking I/O, I/O multiplexing, signal driven I/O (SIGIO) and asynchronous I/O model
   • Select(), poll(), shutdown()

7. Unit 7: Socket Options2 hrs

   • Getsockopt() and setsockopt() functions
   • IPV4, IPV6, TCP socket options (SO_REUSEADDR, TCP_NODELAY)

8. Unit 8: Name and Address Conversion2 hrs

   • Domain Name System, gethostbyname(), gethostbyaddr(), uname(), getservbyname() and getservbyport()
   • gethostname() functions, socket timeouts

9. Unit 9: Unix Domain Protocol3 hrs

   • Introduction, Unix domain socket address structure
   • socketpair function
   • Unix domain stream client-server, UNIX domain datagram client/server

10. Unit 10: Daemon Processes, Inetd Superservers2 hrs

    • Introduction, Syslog facility (syslog function)
    • daemon_init function
    • inetd daemon configuration

11. Unit 11: Broadcast and Multicast3 hrs

    • Introduction, Broadcast and multicast addresses
    • Comparison between broadcast, unicast and multicast socket options
    • Unicast versus Broadcast, multicast versus broadcast on LAN

12. Unit 12: IP Layers and Raw Socket3 hrs

    • Introduction, raw socket creation
    • Input and output packet processing (ping example implementation)